Kevin Magnussen says there is "more to come" from McLaren with just one day of testing remaining.

Saturday saw Magnussen set the fourth fastest time on his final day in the car, but he was 2.5s off the pace set by Felipe Massa's Williams. With Nico Rosberg also close to Massa, Magnussen conceded that both cars looked very quick but said McLaren was still yet to show anywhere near its full hand.

"Mercedes' and Williams' lap times from today look very quick, but I'm sure none of us were in Q3 spec," Magnussen said. "So we'll have to wait and see. We have more to come, but we're not in the best place."

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The next time Magnussen will drive the McLaren will be in FP1 in Melbourne and he said he feels his testing programme has given him a strong base to start from this seaosn.

"You will always feel like you can do more. If you had the time you wouldn't stop, you would learn all the time. I'm sure Michael Schumacher was learning until his last day in Formula One. I've got all the basics covered now, I feel, to go and do a race. I don't feel uncomfortable going in to a race. I feel really comfortable that I know everything, all the procedures and what's important to focus on during a race weekend. That's really positive because it is a big job but I feel ready."

And reflecting on his final day in the car, Magnussen explained the reason for his low mileage in the morning session in Bahrain.

"We had some electrical problems in the morning but managed to solve it very quickly and get on with the programme again. In the end we had a pretty good day and got most of the programme done."